Question

(1.) Sample Lab-Based Question...

In the physics laboratory you are given a metal block that is approximately the size of a brick. You are also given 2.0m long wood plank with a pulley* attached to the end of it. Your objective is to experimentally determine the coefficient of kinetic friction ( μ k ), between the metal block and wood plank.

*Note: you do not necessarilly need to use the pulley.

(a.) From the list below, select the additional equipment you will need to perform your experiment by checking the line in front of each item. Also, indicate if you intend to use more than one item.

______ 200g mass _______10g mass _______ spring scale ______ motion detector _______ balance _______ meter stick ______ a toy battery-operated cart that moves at a constant speed

______ string _______ timer

(b.) Draw a labeled diagram showing how the plank, the metal block, and the additional Equipment you selected will be used to measure/detemine μ k .

(c.) Briefly outline the procedure you will use. Be explicit about what measurements you need to make and how these measurements will be used to determine μ k .

Answer 1

​​​​​​k is the ratio of kinetic friction to the normal reaction